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random: use TinyMT instead of XorShift

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This commit is contained in:
Michael Scire 2019-12-09 23:50:47 -08:00
parent 206b1a1b57
commit 1556a92a38
12 changed files with 415 additions and 175 deletions
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5
stratosphere/loader/source/ldr_process_creation.cpp
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@ -499,9 +499,10 @@ namespace ams::ldr {
/* Set Create Process output. */
uintptr_t aslr_slide = 0;
uintptr_t unused_size = (aslr_size - total_size);
uintptr_t free_size = (aslr_size - total_size);
if (out_cpi->flags & svc::CreateProcessFlag_EnableAslr) {
aslr_slide = ams::rnd::GenerateRandomU64(unused_size / os::MemoryBlockUnitSize) * os::MemoryBlockUnitSize;
/* Nintendo uses MT19937 (not os::GenerateRandomBytes), but we'll just use TinyMT for now. */
aslr_slide = os::GenerateRandomU64(free_size / os::MemoryBlockUnitSize) * os::MemoryBlockUnitSize;
}
/* Set out. */